Modeling of Fluid and Solute Transport in Fractured Rock

by Luis Moreno, Royal Inst of Technology, Stockholm, Sweden,
Ivars Neretnieks, Royal Inst of Technology, Stockholm, Sweden,
Bj?rn Gylling, Royal Inst of Technology, Stockholm, Sweden,

Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1993


A new model for flow and solute transport in fractured rock is proposed. It is based on the concept of a network of channels. The individual channel members are given stochastically selected conductances and volumes. Flow rate calculations have been performed. For large standard deviations in conductance, channeling becomes pronounced will most of the water flowing in a few paths. The effluent patterns and flow rate distributions obtained in the simulations have been compared to three different field measurements in drifts and tunnels. Standard deviations of channels conductances were between 1.6 and 2.4 or more in some cases. A particle following technique was used to simulate solute transport in the network. Nonsorbing as well as sorbing solute transport can be simulated and by a special technique also transport of solute that diffuses into the rock matrix can be simulated.

Subject Headings: Fluid flow | Rock mechanics | Hydraulic fracturing | Flow simulation | Channels (waterway) | Rocks | Flow rates

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